Circuit breaker



Feb. 5, 1929.

C. AALBORG CIRCUIT BREAKER Original Filed Jan. 8, 1923 3 w Y 4. K .9 w m :H 0 T 0 f 3 E b2 4 m A n Y w n A 1 .m ,c a :fnv n M l a M 7 Z 5% uw? 6 a x 4 w iig f A. f f il avlwlu.: i* i an, .2 4, Ah ma f s w Q/ M Q@ 4 a w. a W 7 r1.1 wf; w w M l y al@ mf uw# e Illwl I M- V W WW w@ Z J Z 4 4 3 4. 3 w

Patented Feb. 5, 1929.

FIC.

CHRISTIAN A ALBORG, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO WESTINGIIOUSE ELECTRIC & MANUFACTURING COMPANY, A CORFORATION OF PENNSYLVANIA CIRCUIT BREAKER.

Application filed January 8, 1923, Serial No. 611,253.

My invention relates to systems of installation ot circuit interrupters in power stations and more particularly to installations in which the circuit interrupters are in vertical alinement.

Une object of my invention is to provide a circuit interruptor system in which a circuit interrupter is in each phase ot a polyphase circuit and all the associated circuit interrupters are placed in vertical alinement.

Another objectot my invention is to provide a circuit interruptor system in Which a plurality of alined circuit interrupters are adapted to be simultaneously raised or lowered.

It is also an object of my invention to provide a circuit interruptor system, having circuit interrupters at a plurality of levels, with portable litters at each level which may engage any circuit interruptor on that level, and means for simultaneously operating the alined litters.

It is a further object of my invention to provide a portable lifter for a circuit inter rnpter system with a motor and to so connect this litter with the litters 0n adjacent levels that the circuit interrupters ot any polyphase electrical circuit in the power station may be actuated by a single motor and a suitable number of litters having no motors.

ln my copenilinn` application, Serial No. (311,260, tiled Jan, t, 19223, I have shown and described a system of alincd circuit interrupters in which a motor is operatively connected to each vertical row or' litters cooperating with the vertically alined circuit interruptcrs. Suitable interlocked shatting' serves to connect the motor to the several litters. That system necessitates that the number ot motors equal the number of vertical tiers or polyphase electrical circuits in the power station. 1n my present invention, a` sinsrle motor attached to a portable litter is able to perform the same duties.

1n the accompanying drawings,

Figure 1 is a face view ot a portion of a wall of a power station showing' a system of circuit intcrrupters and litters embodying my invention.

Fig. 2 is a view in vertical section taken Renewed. January 26, 1327.

along ther line 1li-l1 ot' Fig. 1, showing the several litters in their operative positions.

Fig. Il is an enlarged Yface view ot a portion oil a single level showing a lifter in its opera'tive position.

itin'. 4- is a sectional view taken along the line lV-*IV of Fig. 3.

In the several figures of the drawings, the same reference characters indicate like parts.

ln the preferred embodiment of my invention a power station 1 is provided with a plurality oi tioors or levels 2, 3, 4 and 5. Between these tloors are placed horizontal shelves t5 and vertical partitions 7, the latter together with the tioors 3, 4 and 5 forming` cells in cach of which is placed a circuit interruptor 8.

On certain of the floors placed a single portable litter 9 and on one ot the floors is placed a lifter 11 of a particular' construction to be hereinafter more fully described.

Each of the circuit interrupters 8 coniprises a tank portion 12 and a cover portion 13 which carries conductors 14. Conductors 14 terminate in disconnecting Contact memlrers 16, which coact with external electrical conductors 17 that are secured in bushings 1S supported by the shelves (l. i

(plichi): detachable supporting; and con ncctinrr mecha. in lil is secured to the side walls ol cach cell by brin kcls 2t) tor the purpose .olf tnowinp; the tank portions of the circuit in ew; and thereby supporting' them. 'the dtiachable mechanism 19 may be oi" any conventional type. although 1 preter to employ that shown and described in my coilicndingg application, Serial No. G11.- l, filed Jan. 8. 192i'. This mechanism comprises two pairs ot oppositely disposed leversl 21 that are pivotally mounted on the. brackets Qt). each ot the, levers being;` provided with a hook 22 for engaging the flange portion 23 ot the circuit interrupter tanks l'l. The relative positions of the members ot pairs ot levers 2l are controlled bv a threaded shaft Q4 that extends therebetween and is provided with an adjusting nut 25 thereon.

As shown in Fig. 3, the cover' member 13 of each circuit interrupter is equipped with a flange 2G of larger diameter than the flange 23. These flanges are permanently clamped together by the mechanism 19 when the circuit interrupter is in its operative position.

The litters i) of each comprise a bodM tion 27 which is supported on wheels 25% and carries a frame 29 which is equipped with arms 30. The body portion 2'( carries a horizontal shaft 31 having a beveled gear connertion 32 to a vertical threaded shaft S8 for adjusting the position of the arms 30. The other end of the shatt 231 is provided with a bevel gear wheel i4 that is adapted to pas.; through an opening,r in the wall ot the station to engage a similar gear wheel 35 and a lo lf. mechanism Sti, thi` details of which are shown and described in my copendingr' aoplication, Serial No. 011,260, filed dan. 8, 19225. The lifter 11 differ," from the litters 9 in that the body portion 27 supports a motor 37 which. is geared at 38 to the shaft. 30. A detachable electrical connector 39 is carried by the motor 37. The severa-l lifters., when in tht' operative positions, have a common ope lative connection to the motor 37 through shaft 4l.

In thel operation ot' an installation of circuit interrnpters, it is often desirable to open and inspect the circuit interrupters of each polyphase circuit. However', care should be taken that all the circuit interrupters et cach polyphase circuit be moved as a unit. In order to open any ot' said circuit interrupters, the litters 9 and 11 are placed in their properly alined cells in such positions that the arms 30 are beneath the corresponding flanges 23 of the tank portions 12 and the bevel gear wheels 34 and 35 are in engagement. The end portions of the shafts 31 release the interlock mechanism 36 to permit the operation of the shaft 41.

The motor 37 is then energized, and it operates through the gearing 38. the associated shaft 31. the several pairs of l.cear wheels :it and S15 and shaft 4l to etieet the raising' of the arms Il() of the several litters until they engage the flanges 9 the we' it of v por 2') to remove d the circuit interruptor-s from the connecting mechanisms 1f). The latter are then dif-:engaged from the tanks by actuation ol the adjustin;y nuts 25 to permit the removal ot the hools from the flanges 23. The motor 37 is then reversed and the circuit interrupters are then lowered. The initial downward movement of the circuit interrupters causes the separation of the Contact members 1G of conductors 14 from conductors 17 to insure the de-energixation of the circuit interruptor mechanism.

Downward motion of the circuit interrupters continues until the flanges 2G of the covers engage the lower flanges 42 of channel beams 43 that are secured to the sides of the cell walls. The covers and the attached circuit interruptor mechanism are supported by the brains 43. The flanges 23 of the tank portions 12, being,` of smaller diameter pais between the flanges 42, and the downward movement continues until the tanks rest upon the body portions 27 of the several litters 9 and `11, whereupon the motor 37 is stopped liy the operator.

The several litters 9 and 11 may then be disconnected from the shaft t 41 and alten to anyv suitable point for repair ot the tanks 12 or to permit access to the suspended cover portions 13.

when itis desired to replace the circuit interrupters the several steps are reversed. The litters 9 and 11 are first placed in their respective cells and in engagement with the shaft -l-l. The motor is then operated to raise the arms 30 and the tanks 12 until engagement is made with the suspended covers 13. The entire circuit interrupters are then raised to their operative positions where their weight is transferred from the arms 30 to the hooks 22 of the levers 21 by manipulation of the adjusting mechanisms. The litters 9 and 11 are then removed Yfrom the several cells and are available tor use elsewhere in the power station.

Iy my invention I have provided an installation of circuit interrupters for a power station which permits ready acc to the inclosed parts of the individual circuit interrupters and that requires a single lifter for each floor or level of the power station regardless ofthe number of circuit interruptcrs on the floor. One of the litters is equipped with a` motor which may be transferred to any desired point in the power station, although it preferably placed on an intermediate loor, as is shown in Fig. 2, where it is obvious that a. small amount of shafting 41 is needed to reach the other floors. My invention, moreover, provides vgreat improvement in that a single operator may, by means ol' a single motor, lower or rait-c any or all oll the circuit interruiliters in any vertical row in the power station.

It will he apparent that various modifications may be made in the apparatus without departurefrom the spirit ol the invention, as detined in the accompanying claims.

I claim as my invention:

1. In an electrical apparatus, a plurality of circuit interrupters at each of a plurality of levels, a portable lifting member at cach of said levels, one of said litters being,Y equipped with a power device, and means for connecting the several lifting' members when in their operative positions.

2. In an electrical apparatus, a plurality of circuit interrupters in vertical alinen'ient, a portable lifter for each of said circuit interruptcrs, one of said litters being equipped with a power device, and connecting;- means between said litters when in their operative positions.

3. In an electrical apparatus, a plurality of circuit interrupters at different levels, a litter at each level, said litters being interchangeable between the several circuit interrupters, a power device bein associated with one of said litters, and connecting means between the several litters when in their operative positions.

4. In an electrical apparatus, a plurality of circuit interrupters at dilferent levels, a portable lifter at each level, an electrical motor secured to one of said litters, and connecting means between said litters when in their operative positions whereby said motor simultaneously operates all ot said litters.

5. In an electrical apparatus, a plurality ot circuit interrupters at each of a plurality ot' levels, a portable lifter at each of said levels for selective engagement With any circuit interrupter on that level, a power device beingl associated with one et said lifters, and connecting' means between the several levels whereby said power device operates all of said litters when the latter are in their alined operating` positions.

In testimony whereof, I have hereunto subscribed my name this second day of J anuary 1923.

CHRISTIAN AALBORG. 

